Process for utilizing residual heat



July 254, 193.

A. S. COOPER vPROCESS FOR UTILIZING RESIDUAL HEAT 2 Sheets-Sheet l .NNI

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Filed Oct. 7, 1921 July 24, 1923.

A. S. COOPER PROCESS FOR UTILIZING RESIDUAL HEAT Filed OCb, '7 1921 .Mam

Patented July 24, 1923.

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AUGUSTUS S. COOPER', 0F SANTA BARBARA, CALIFORNIA.

PROCESS FOR UTILIZING RESIDUAL HEAT.

Application filed October 7, 1921.

invented certain new and useful Improvements in Processes for Utilizing Residual Heat, of which the following is a specification.

The present invention relates to a process, and apparatus for using residual heat in laying asphalti-c surfaces and has for its principal object to provide a process utilizing natural bituminized sand and the asphaltic residuum of petroleum stills.

Another important object of the invention is to provide an apparatus for imparting heat to the road-surface for receiving the bituminized sand or the asphaltic residuum.

In the drawing r- Figure. l is a top plan of a road in the process of being formed,

Figure 2 is an elevation thereof,

Figure 3 is a longitudinal section showing the apparatus for imparting heat to the road, and

Figure 4 is an end elevation thereof.

Referring to the drawing in detail it will be seen that the road foundation surfaced with broken rock is indicated at H. A section of heated rock s placed on the foundation and is shown in Figures l and 2 ready to be covered with pieces of bitumi nized sand. The corrugated iron hoods A for the oil Haines are used in heating the broken rock. The hoods B1 to B8 inclusive cover the heatedrock and pieces of bituminized sand. The hoods B7 and B8 are used for a platform to place the bituminized sand on the heated broken rock in section E. The heated and plastic pieces D of bituminized sand are ready to be raked and rolled after the hoods have been removed therefrom and will resemble the finished pavement rolled and consolidated as is shown at C.

While section E is being covered with pieces of bituminized sand the space A is being heated; when the section E is covered with pieces of bituminized sand the heater A is moved to F and the hoods B1 and B2 are carried forward and placed over the section E. This cycle of operation being constantly repeated.

A iiat iiame from an oil burner or burners is introduced in the hood A and is made to impinge the surface of the graded or pre- Serial No. 506,053.

pared surface of the road. The oil flame heats the surface. After the heater moves forward, the bituminous sand rock broken in pieces that will go through a three inch ring, is spread `over the heated surface, thick enough so as to touch one another and at the same time covered with `a hood or mantle B1 to B8 that will withstand and confine the heat. The hood is allowed to'remain until the asphalt in the sand rock is softened by the heat retained in the surface of the road, so it can be easily raked. The bituminous sand rock will be kept plastic for a long time by the residual heat in the road surface giving ample time for its manipulation. After the removal of the mantle the bitumi nous sand rock is raked to a uniform thickness over the surface of the road. After raking and while the bituminous rock is in a spongy condition the surface is strewn with hot broken stone that will go through an inch and a half ring and not through an inch ring, sufficiently thick so that one pieceof rock will nearly touch the adjoining piece. Heating the surface and the broken rock removes the hydroscopic and other moisture, so that the asphalt will strongly adhere to them. A cold surface or rock chills the asphalt so that it will not enter the small pores of the rock nor the spaces between them. After the broken rock is spread over the surface of the spongy bituminous rock it is consolidated by rolling. The pieces of broken rock are forced into the spongy sand rock and the flat sides of the rock are turned upward by the action of the roller and form part of the surface of the completed road. The bituminized sand is forced upwards between the nearly adjoining pieces of broken stone materially binding them together.

Referring especially to Figures 3 and 4 of the drawing it will be seen that I have illustrated an apparatus for imparting heat to the road bed which consists of the ironing tank A which is open at both ends having a door 10 at one end and a door l1 at the other end which are hingedly mounted transversely of the ironing tank. A smoke chimney l2 is provided adjacent one end preferably the smaller end wherein is situated the door l0 and the ironing tank is adapted t0 be lifted by the apparatus 13 which may be of any preferred construction and is attached to a wheel vehicle indicated at 14. It will be noted that the smaller end of the tank A is situated adjacent the vehicle so as to follow the same and will be hereinafter known as the front end thereof. A compressed air pipe 15 is in communication with a Suitable compressed air tank, not shown, carried by the Vehicle 14 and communicates with the burner 16 having the fiat spout 17 so as to shoot a flat fiame on the bottom of the tank A. This burner 16 is provided with a fuel pipe y18 leading from a suitable fuel tankcarried on the vehicle 14. This fuel will preferably be oil and it will be noted that a drip pipe 19 is in communication with the pipe 18. intermediate its ends so as to pass approximately centrally through the topof the tank A so as to drop oil. adjacent the spot where the flame from the spout 17 `hits the bottomof the ironing tank A so as to keep this fiame ignited and add intensive heat by having the flame extended and` allowing the same to burn longer. The spout 17 islsituated so as to pass through one of the openings 2O and if so desired there may be two of the burners.

Having thus described my. invention what I claim as new is 1. A process of the class described consisting of first heating the road surface,

placing bituminized sand rock over the heated surface7 covering the same with hoods that will confine the heat, and allowing the hoodsto remain in place until the asphalt in the sand rock is softened by the heat retained in the surface of the road, raking the bituminous sand rock to a uniform thickness over the surface of the road/and when in a spongy condition strewing` the surface with hot broken stone and afterwards rolling so as to form a smooth surface.

2. An apparatus for heating a road sur face comprising an ironing tank including a bottom having` a hood arranged thereover provided with openings in its front and rear end, closures hngedly associated with said openings so as to swing rearwardly, and means for raising the front end of the hood.

3. An apparatus for heatingv a road 'surface comprising an ironing tank including a bottom having a hood arranged thereover with openings in its front and rear end, doors hingedly mounted adjacent said openings so as to swing rearwardly of the tank, heating means for the bottom of. the tank7 and means for lifting the front end of the tank in the manner and for. thel purpose specified.

In testimony whereof l alli); my signature in presence of two witnesses.

AUGUSTUS S. COOPER.

lVitnesses CHARLES A. SLONKI, CLIFTON C. NEUMAN. 

